EDTK vs SSM: Correlation
Measured on weekly returns over the past three years, Skillful Craftsman Education Technology Limited (EDTK) and Sono Group N.V. (SSM) carry a correlation of 0.28, a weak link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are EDTK and SSM?
Across a 3-year window, the weekly returns of EDTK and SSM correlate at 0.28, weak. Lately the two have drifted apart, with the 1-year correlation at -0.20 versus 0.28 over 3 years. Stretching to 5 years gives 0.19, with an annualized covariance of 15152.5 %².
In EDTK's tracked universe of 16 assets, SSM sits right near the top at #1. Their recent paths diverged sharply: over the last 12 months EDTK outperformed by 32.3 percentage points (-18.2% for EDTK against -50.5% for SSM). Risk is not evenly split, since SSM carries 26.5 times the volatility of the other side.
How is this computed?
Pearson correlation on weekly returns: ρ(A,B) = cov(rA, rB) / (σA · σB), over windows of 52, 156 and 260 weeks. Covariance is annualized (×52) and expressed in %². Full definitions on the methodology page.
EDTK vs SSM: side by side
| EDTK (Skillful Craftsman Education Technology Limited) | SSM (Sono Group N.V.) | |
|---|---|---|
| 1-year return | -18.2% | -50.5% |
| 5-year return | -41.9% | -99.9% |
| Volatility (ann.) | 45.4% | 1204.8% |
| Beta vs S&P 500 | -0.09 | 0.56 |
| Max drawdown (3Y) | -35.4% | -99.4% |
| Market cap | – | – |
| P/E (trailing) | – | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | EDTK | SSM |
|---|---|---|
| 2022 | +52.4% | -89.8% |
| 2023 | -12.5% | -93.9% |
| 2024 | -19.8% | -16.7% |
| 2025 | -10.9% | +86.7% |
| 2026 | +0.0% | -61.1% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are EDTK and SSM good diversifiers for each other?
Reasonably. At 0.28, EDTK and SSM keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between EDTK and SSM?
As of 2026-08-27, the correlation of weekly returns between EDTK and SSM is 0.28 over 3 years, -0.20 over 1 year and 0.19 over 5 years.
Is SSM a good diversifier for EDTK?
Reasonably. At 0.28, EDTK and SSM keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.28 mean?
Correlation ranges from −1 to +1. Values near +1 mean two assets move together, near 0 that they move independently, and negative values that they tend to move in opposite directions. It measures co-movement, not performance.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/edtk-vs-ssm.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/edtk-vs-ssm/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: EDTK correlations · SSM correlations
